锡林浩特市城市风景林生态效益研究

锡林浩特市位于中国正北方,内蒙古自治区中部。锡林浩特市城市风景林带是锡林浩特市生态环境建设的一个有机组成部分,同时也是区域生态环境建设的一个重要屏障。作为城市风景林带,其所具有的防风功能的大小,是建设城市风景林的一个重要指标。通过测定证明,不同风景林带对不同高度层的风速降低作用差异很大。灌木林带(大白柠条和山杏)主要以降低近地层风速(100cm以下)为主,对高层风速影响相对较小;而乔木林带(银中杨和沙地榆)则以降低高层风速为主(100cm以上)。不同林带类型降低沙粒沉积数量的作用效果明显,当风速为7.0m/s时,裸地1分钟内沙粒沉积重量为9.89g,而银中杨林带相同时间沉积的沙粒重量仅为1.40g,沙地榆林带1分钟内沙粒沉积的重量为4.47g,大白柠条林带相同时间沙粒沉积的重量为1.07g,是四种林带中沉积沙粒重量最少的类型,山杏1分钟内沙粒沉积的重量为1.25g。

Research on Ecological Benefit of the Urban Landscape Forest in Xilinhot City

Xilinhot City is located in central of Inner Mongolia Autonomous Region.The urban landscape forest belt is an organic component of ecological environment construction of Xilinhot the wind break function of the urban forest belt is one of the important indicators for building the urban landscape forest.Measurement results showed that the different landscape forest belts had different effect to reduce the wind speed at different height levels.Shrub(Caragana Yorkshire and apricot) was mainly reduced wind speed near ground(100cm);The tree shelterbelt(poplar and elm) is mainly lower top wind speed(100 cm above).The different types of forest had different effect on reducing the sand deposition.When the wind speed was 7.0 m/s,the sand deposition on bare land was 9.89 g in one minute,and that in poplar-elm forest was only 1.40g,in elm forest is 4.47g,in Caragana belt shelterbelt is 1.07g at the same time,in apricot is 1.25 g in one minute.